Datasheet

AD7767
Rev. C | Page 3 of 24
SPECIFICATIONS
AV
DD
= DV
DD
= 2.5 V ± 5%, V
DRIVE
= 1.8 V to 3.6 V, V
REF
= 5 V, MCLK = 1 MHz, common-mode input = V
REF
/2, T
A
= −40°C to +105°C,
unless otherwise noted.
Table 2.
Parameter Test Conditions/Comments Min Typ Max Unit
OUTPUT DATA RATE (ODR)
AD7767 Decimate by 8 128 kHz
AD7767-1 Decimate by 16 64 kHz
AD7767-2 Decimate by 32 32 kHz
ANALOG INPUT
1
Differential Input Voltage V
IN+
− V
IN−
±V
REF
V p-p
Absolute Input Voltage V
IN+
−0.1 +V
REF
+ 0.1 V
V
IN−
−0.1 +V
REF
+ 0.1 V
Common-Mode Input Voltage V
REF
/2 − 5% V
REF
/2 V
REF
/2 + 5% V
Input Capacitance 22 pF
DYNAMIC PERFORMANCE
AD7767 Decimate by 8, ODR = 128 kHz
Dynamic Range
2
Shorted inputs 108 109.5 dB
Signal-to-Noise Ratio (SNR)
2
Full-scale input amplitude, 1 kHz tone 107 108.5 dB
Spurious-Free Dynamic Range (SFDR)
2
Full-scale input amplitude, 1 kHz tone −128 −116 dB
Total Harmonic Distortion (THD)
2
Full-scale input amplitude, 1 kHz tone −118 −105 dB
Intermodulation Distortion (IMD)
2
Tone A = 49.7 kHz, Tone B = 50.3 kHz
Second-Order Terms −133 dB
Third-Order Terms −109 dB
AD7767-1 Decimate by 16, ODR = 64 kHz
Dynamic Range
2
Shorted inputs 111 112.5 dB
Signal-to-Noise Ratio (SNR)
2
Full-scale input amplitude, 1 kHz tone 110 111.5 dB
Spurious-Free Dynamic Range (SFDR)
2
Full-scale input amplitude, 1 kHz tone −128 −116 dB
Total Harmonic Distortion (THD)
2
Full-scale input amplitude, 1 kHz tone −118 −105 dB
Intermodulation Distortion (IMD)
2
Tone A = 24.7 kHz, Tone B = 25.3 kHz dB
Second-Order Terms −133 dB
Third-Order Terms −108 dB
AD7767-2 Decimate by 32, ODR = 32 kHz
Dynamic Range
2
Shorted inputs 114 115.5 dB
Signal-to-Noise Ratio (SNR)
2
Full-scale input amplitude, 1 kHz tone 112 113.5 dB
Spurious-Free Dynamic Range (SFDR)
2
Full-scale input amplitude, 1 kHz tone −128 −116 dB
Total Harmonic Distortion (THD)
2
Full-scale input amplitude, 1 kHz tone −118 −105 dB
Intermodulation Distortion (IMD)
2
Tone A = 11.7 kHz, Tone B = 12.3 kHz dB
Second-Order Terms −137 dB
Third-Order Terms −108 dB
DC ACCURACY
1
For all devices
Resolution No missing codes 24 Bits
Differential Nonlinearity
2
Guaranteed monotonic to 24 bits
Integral Nonlinearity
2
18-bit linearity ±3 ±7.6 ppm
Zero Error
2
20 V
Gain Error
2
0.0075 0.075 % FS
Zero Error Drift
2
15 nV/°C
Gain Error Drift
2
0.4 ppm/°C
Common-Mode Rejection Ratio
2
50 Hz tone −110 dB